We had a wonderful stay: the apartment is above a (very good) restaurant that overlooks a canal (from which you can get a boat tour around the khlongs) in the heart of Thonburi. This is Old Bangkok, and there are virtually no tourists - a fully functioning temple and school around the corner, alleyways, homes and small businesses - including Priscilla's Ice Cream (try the passionfruit sorbet or the guava plum - amazing), a 30-second walk away. You're a 15-minute walk from the river and Wang Lang market, a fantastic place to go for breakfast, lunch or a Thai massage. Roughly the same distance is Itsaraphap metro station which connects you to the rest of the city via the MRT subway system; thee's also a great little night market where you can get great food and milkshakes.
Title is amazing: she booked our cab from the airport and organised boat trips in addition to seeing we had everything we needed in the apartment. She and her partner Ohm also gave us advice on places to eat (Uncle's Boat Noodles!) and things to do in the area; they couldn't have been more helpful or friendly. We stayed for a month, but could have done with a whole lot more.